I was always used to saying hearing "добрийдін" do-BREY-ding as a single word for good morning, is that a colloquialism of post WWII diaspora in US-NYC area?
Добрий ранок - це росіянізм, it is a russian construction. In Ukrainian it should be only Доброго ранку.
"Dobryi ranok." was marked wrong. How do I get the accents for the new Latin writing?
You can switch back in the first lesson of the first skill if you want. I did so I don't know what accents you are seeing. Many accents are available in the International keyboard, but I am using the Ukrainian keyboard right now.